Anatomical Analysis of Intraorbital Structures Regarding Sinus Surgery Using Multiplanar Reconstruction of Computed Tomography Scans
نویسندگان
چکیده
OBJECTIVES This study aimed to investigate the anatomy of the intraorbital structures regarding to endoscopic sinus surgery and external frontal sinus surgery analyzing computer tomography (CT) scans. METHODS The CT scans of 100 patients were retrospectively evaluated. The anatomic relationships between the intraorbital structures and paranasal structures were measured using multiplanar reconstruction of the CT scan. RESULTS The mean distances from the medial orbital floor (MOF) to the intraorbital structures were measured at the depth of the anterior ethmoid (AE), basal lamella (BL), and midportion of posterior ethmoid (PE) in the coronal planes respectively. The mean distances from the MOF to the medial rectus muscle and inferior rectus muscle at the depth of AE were approximately 8 mm and those distances in the BL and PE decreased rapidly. The mean distances from the MOF to the infraorbital nerve at the depth of the AE and BL were approximately more than 10 mm. The mean distances from the vertical axis, which passed through the MOF, to the superior oblique muscle and optic nerve at the depth of the PE were approximately 5 mm medially and 1 mm laterally. In addition, the mean distance from the midline to the trochlea of the superior oblique muscle was approximately 15 mm. CONCLUSIONS Those measurements provide spatial information on the placements of the extraocular muscles within the orbit. The measurements will contribute to the avoidance of orbital complications during sinus surgery.
منابع مشابه
Evaluation of Anatomical Variations of Paranasal Sinuses in Cone-beam Computed Tomography (CBCT) of Patients with Chronic Rhinosinusitis in Comparing with Normal Individuals
Introdouction: An exact knowledge of the anatomical variations of the paranasal sinuses (PNS) is critical for surgeons performing endoscopic sinus surgery and for radiologists involved in making preoperative evaluations. An important aspect is the determination of correlation between the anatomical variations of PNS and the presence of chronic rhinosinusitis (CR). Cone-beam computed tomograph...
متن کاملStudy of frontal recess anatomy based on three-dimension computed tomography images reconstruction in Chinese subjects without frontal sinus disease
Background: The complication of frontal recess brings many difficulties to the doctor’s surgery operations, and comprehensive understanding of frontal recess anatomy is essential for the successful treatment of subjects with frontal sinus disease. The purpose of the study is to describe the feature of the 3D model of frontal recess, and obtain the true image of the important anatomical structur...
متن کاملAnatomic variations of sphenoid sinus from Cone Beam Computed Tomography images in the Iranian population
Aims: Sphenoid sinus is one of the most inaccessible paranasal sinus, and is closely correlated to many vascular and neural structures. Anatomic variation of the sphenoid sinus can complicate surgery in this area. The aim of the present investigation was to define the sphenoid sinus variations and the relevant structures using cone-beam computed tomography (CBCT). Methods: This cross-sectiona...
متن کاملComputed tomography-based exploration of infundibular anatomy for maxillary sinus balloon dilation.
OBJECTIVES A clinically relevant reconstruction of the ethmoid infundibulum and maxillary sinus ostium was developed to use 3-dimensional computed tomographic (CT) imaging technology and measurement software in an effort to better understand the anatomy of the maxillary sinus ostium and to optimize the maxillary sinus balloon dilation technique. METHODS A retrospective review was performed of...
متن کاملPrevalence of Anatomical Variations of the Sinonasal Region and their Relationship with Chronic Rhinosinusitis.
Background Precise knowledge of anatomic variations of nose and paranasal sinus complex is essential for achieving best surgical results during endoscopic sinus surgery. Computed tomography is the gold standard investigation for evaluation of paranasal sinuses and adjacent structures. Objective To study prevalence of anatomical variations of nose, paranasal sinuses and osteomeatal complex and t...
متن کامل